Upgrade plexus-utils to 3.1.1

Closes #109

Author: plamentotev

pom.xml

@@ -57,7 +57,7 @@
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-utils</artifactId>
-      <version>3.1.0</version>
+      <version>3.1.1</version>
     </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>